Imfrovement in pipe-ramming machines



A. T jRoDlE. Pipe-Hammingl Machines.

PatentedJune 9,187'4.

UNITED STATES PATENT OFFICE.

ANTHQNY T. BRODIE, OF CONNELLSVILLE, PNNSYLVANIA.

IMPROVEMENT IN PIPE-RAMNHNG MACHINES'.

Specification forming part of Letters Patent No. 151,681, dated June 9, 1874; application tiled April 17, 1874.

To all whom it may concern l y Be it known that I, ANTHONY T. BRonIE, of Oonnellsville, in the county of Fayette a-nd State of Pennsylvania, have invented a new and useful Improvement in Pipe Ram ming Machine; and I do hereby declare the following to be a full, clear, and exact description thereof, reference being had to the accompanying drawing, forming a part of this specification, in which- Figure 1 is a vertical elevation of my improved pipe-rammin g apparatus, the ilask being shown in section. Fig. 2 is a view of the centering device. Fig. 3 is a side view of a portion of the apparatus; and Figs. 4, 5, and 6 are detail views.

Like letters of reference indicate like parts in each.

My invention consists in a machine for forming molds Jfor making cast-iron pipe. The distinguishing fea-tures of this machine consist, rst, in a combination of certain devices for imparting a vertical and rotary motion to the ram, and for releasing the ram, so that it may be raised or lowered by a vertical movement alone, so as to adjust the ram in a quick and easy manner; second, in the arrangement and devices for operating the bowl-pattern, so that the bowl of the pipe may be formed at the Sametime that the pipe-pattern itself is formed;

, third, in a device for centering the flask under a ram.

To enable others skilled in the art to make and use my invention, I will describe its construction and operation.

Upon a suitable bottom plate, a, I secure the flask-stand a. This stand has an internal cavity of sufficient size to receive the ram, and is beveled out at its upper end for the purpose of placing and centering the lower end of the flask. The upper end of the flask is centered lso as to bring it into proper position under the ram by means of the band o, which is hinged at c1 to the strap c2, and is secured at the other end by a latch, d', on the end ot' the strap d. Projecting through the strap c2, band o, and strap d, are set-screws e. These set-screws bear against the flask b, and are operative for the purpose of centering it properly under the ram. On the lower. end of the threaded spindief is a ram, g, having a tapered upper end,

gf, a cylindrical body, the diameter of which is equal to the diameter of the pipe to be formed, and round or tapered lower end. The spindle at or near its upper end extends through a double bearing, lL, and a initerwheel, i, the latter being placed between the two bearings. This niiter-wheel is secured to the spindle by means of a tongue, il, extending into a groove, 2, whichl runs along the entire length of the spindle. The miter-wheel is loose upon the spindle, so that the latter may be drawn through it at pleasure. Mounted on the bearing 7L is a two-part nut, l, which is hinged at l, so that it may be opened or closed, and when closed is secured around the spindle f by means of the hook l2. Meshing into the miterwheel fi is a second wheel, m, which is placed on the end of thev shaft mf, and is designed for communicating power from the pulley a to the spindle j'. Next to the pulley n there is a loose pulley, n. On the upper end of the spindle j' is a swivel, o, which permits the turning of the spindle without moving itself. EX-

tending up from this spindle o, over a pulley, t

p1, is a chain or line, p, to the other end ot' which is attached a weight or counter-balance, p2. Arranged just over the upper end of the dask b is a frame, q, in which are mounted a pair of pinions, q1, meshing into the racks q2, which extend through the brackets g3, and carry the pattern r. This pattern r is the pattern for the bowl of the pipe. The movement of the rack and pinion is sufficient to insert it the proper distance into the mouth of the iiask to form the bowl-mouth of the mold. These pinions are operated by the hand-wheel g4. The operators stand is designed to be arranged in such position that he can with ease supply the sand to the iiask, operate the handwheel g4, and the nut Z.

The operation of my improvement is as follows: The ram resting in its stand a, the liask` b is centered by means ofthe screws e. Power is then applied to the pulley n, and the nut Z closed, as shown in Fig. l. Then the miterwheel m, meshing into the wheel t', which is secured to the spindle by the key and groove l and i2, as described, causes the spindle to be rotated in the nut l. This causes the gradual rise of the ram g by a rotary progressive motion through the center of the 11a-sl; b. The

sand, being fed by the operator into the ask in the usual way, is paeked by the tapered rain as it rises, so as to form the mold. NV hen the ram reachesr the upper end ot' the Vflask b, the pattern 1^ is lowered into position by means of the rack and pinion q1 and q2, and the sand is packed around the outer side of the pattern by the workman at the moment when the ram reaches and enters the pattern 1". The mold havin g been completed, the operator opens the two-part nut Z by throwing back the hook l2, so that the spindle m aycontinue to rotate without rising, or he stops its motion by throwing the belt onto theloosepulley. The liask is theni'reed by opening the band c and raising the pattern 1", and is replaced by an empty ilask, which is centered in the manner described. Then, in order to return the ram to the stand a without going through the long tedious operation of screwing it back, the nut l is opened in the manner described, and the ram, being counterbalanced by the weight p2, may be drawn down to place by the workman with ease, the key of the miterwheel i sliding in the groove i2 permitting` this movement. The 'pinions q2 may be movable on their arbors to suit different sizes of bowl-patterns. For convenience, the

ramming-pit is generally nextto the oven, so

that the flasks when lled may be hoisted directly. by means of the crane.'

Power may be applied to the shaft on in any other known or desirable way. The spindle f may be turned by a worm meshing into a square pinion, instead of the miter-wheel.

What I claim as my invention, and desire to secure by Letters Patent, is

l. The threaded grooved spindle f, carrying the ram g, in combination with the pinion t' and the divided nut l, substantially as and for the purpose specified.

2. The bowl pattern r, mounted in the bracket g3, in combination with the racks q2 and pinions q1, substantially as and for the purposes described.

3. The centering apparatus, consisting of the band c, straps c2 d, and screws e, substantially as described.

4. In the centering apparatus of a pipe-ramming machine, the hinged band c, having a catch, d', in combination with the straps c2 d, substantially as and for the purpose specified. In testimony whereof I, the said ANTHONY T. BRODIE, have hereunto set my hand.

Witnesses: ANTHONY T. BRODIE.

T. B. KERK, E. C'. FITLER. 

